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Governed SIC & NAICS Reference — human-reviewed classification with audit-ready methodology
SICCODE.com is a reference library for SIC and NAICS industry classification. Use directories and code pages to confirm scope with included/excluded activity boundaries, hierarchy context, and standards-aligned guidance—so code selections remain defensible across analytics, compliance, procurement, and AI workflows.
Find a code fast
Search by keyword, code, or company name. Open the code page to confirm included/excluded activities.
What is a SIC code?
SIC (Standard Industrial Classification) is a legacy classification system used for historical comparability and many established reporting workflows.
What is a NAICS code?
NAICS (North American Industry Classification System) is the modern standard organized by production processes and updated to reflect today’s economy.
Start with SIC
Use the SIC hub for structure and decision rules, then open a specific code page.
Browse SIC CodesStart with NAICS
Use the NAICS hub for principles and hierarchy, then open a specific code page.
Browse NAICS CodesEstablishment-level classification (why a single company may have multiple codes)
SIC and NAICS are designed to classify establishments (distinct operating units). A parent brand may operate multiple establishments with different primary activities—each requiring its own defensible code selection.
Enterprise / Parent Brand
One organization can own multiple operating units (locations, plants, divisions).
Governance: classify the operating unitDecision rule (primary activity)
Select the code for each establishment based on what it primarily does (process/output + revenue dominance), then validate boundaries using included/excluded activities.
Avoid: keyword-only or HQ biasEstablishment A
Manufacturing plant (production process dominates).
Primary code: ManufacturingEstablishment B
Wholesale distribution center (sales/logistics dominates).
Primary code: WholesaleEstablishment C
Retail / e-commerce operations (customer-facing retail activity).
Primary code: RetailExplore the classification library
Industry Classification Hubs (top-level sectors)
Navigate SIC & NAICS as a structured taxonomy. Start at top-level sectors, then drill down to specific industries and code pages.
Explore Classification Hubs →Industry Intelligence Center (governance + applied guidance)
Governance-oriented guidance on classification accuracy, AI alignment, and defensible SIC/NAICS usage in real workflows.
Open the Intelligence Center →SIC vs NAICS (when to use each)
Compare structure, revision cycles, and real-world usage. Strong starting point for crosswalk decisions.
Compare SIC vs NAICS →Citations & academic recognition
Publications that reference SICCODE.com for classification context, definitions, and research use.
View Citations →About the review team
How pages are maintained, reviewed, and kept consistent across SIC and NAICS reference materials.
Meet the Review Team →Applied data services
SICCODE.com operates first as an industry classification reference. For teams implementing governed classification at scale (CRM, enrichment, analytics, compliance), we provide applied data services built on the same standards.
List building & targeting
Build company and contact datasets using SIC and NAICS classification as the primary segmentation layer.
Data enhancement & classification appending
Append or standardize SIC and NAICS codes on existing records to improve consistency across analytics, compliance, and outreach workflows.
Support & access
Pricing, scoping, and support for classification-driven data services.
Frequently asked questions
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How is SICCODE.com different from other SIC/NAICS sites?
SICCODE.com applies governed methodology with human review, version control, and audit-ready documentation—not just automated lookups or unverified listings. Use the Authority & Trust Hub to review governance standards.
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Can I trust classifications for compliance or regulated workflows?
Use code pages for defensible scope boundaries (included/excluded activities) and reference the governance documentation in the Authority & Trust Hub for review, change control, and auditability signals.
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What’s the fastest way to find the correct code?
Use search to open a specific code page, then confirm the selection using hierarchy context and included/excluded activity boundaries rather than keywords alone.
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How often are codes updated?
NAICS is updated on a regular revision cycle (commonly every 5 years). SICCODE.com maintains governance documentation and version-aware guidance to support historical comparability when revisions occur.
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How do SIC/NAICS codes help AI and analytics workflows?
Governed classification creates stable categorical features for segmentation, reporting, and model training. Use code pages to validate boundaries and the Authority & Trust Hub for governance signals (review, versioning, auditability).
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Do you offer services beyond reference pages?
Yes. If you need governed SIC/NAICS applied at scale (lists, enrichment, appends), start with Build Your Business List or use the Applied Data Services section above.